安装CDT插件，方法如下：
1、启动eclipse，
2、选择Help->Install New Software...，在Work with的框框下复制下面的地址： http://download.eclipse.org/releases/galileo
3、选择Collaboration->Mylyn Bridge: C/C++ Development，安装，重启eclipse。
4、同上述2、3，选择Programming Languages->Eclipse C/C++ Development，都选上吧，现在硬盘不贵的。重启eclipse，试试吧，有tutorial的。
注意：
在安装Mylyn Bridge: C/C++ Development，如果直接选择安装Eclipse C/C++ Development，会出现如下错误：
Cannot complete the install because one or more required items could not be found.
Software being installed: Mylyn Bridge: C/C++ Development 5.1.0.200909110608 (org.eclipse.cdt.mylyn.feature.group 5.1.0.200909110608)
Missing requirement: Mylyn Bridge: C/C++ Development 5.1.0.200909110608 (org.eclipse.cdt.mylyn.feature.group 5.1.0.200909110608) requires 'org.eclipse.mylyn.context.core 3.0.0' but it could not be found